Hitachi DIGITAL 8 VM-D965LE - Page 110

(2) Results of diagnosis
Table 1-3 summarizes the results of diagnosis and the circuits/parts deemed to be defective in the B mode.
Loading
motor
Trouble
sensors
Tape
detection
switches,
etc.
Capstan
motor
Cylinder
Table 1-3 Results of B Mode Self-Diagnosis (1/2)
Display
|
Results
of
diagnosis
Parts/circults
deemed
to
be
defective
Detect
display
conditions)
LOD
The
loading
motor
is
defective when
running
Loading
motor
forward.
Rotation
of
drive
gears in mechanical
block
(Does not
load
within 10 seconds.)
faulty.
ICO671
L
_
_
-
ICO901
UNL
The
loading
motor
is
defective
when
runnig
IC0902
in
reverse.
Power supply
(5V,
B+) lines.
(Does
not
unload
within 10 seconds.)
RSS
The
pulse
from
the
supply
reel
sensor is
Supply
reel
disk
defective.
Trouble sensor (reel sensor)
(There
is
one pulse
or
less withinte
two
Capstan
motor
L
2s seconds.)
7
ICO901
RST
The
pulse
from
the
take-up
reel
sensor
is
Take-up
reel
disk
defective.
Trouble
sensor
(reel sensor)
(There is one pulse or less within two
The pulse from the supply end sensor Is
defective. (No pulse is input for more than
100 ms continuously within two seconds.)
The pulse from the take-up end sensor is
defective. (No pulse ts input for more than
100 ms continuously within two seconds.)
Capstan motor
Trouble sensors (end sensor/end LED)
Q0905
IC0901
Trouble sensors (end sensor/end LED)
Q0905
ICO901
DC-DC converter circuit (B+ line)
TAB The erase prevention tab detection switch
_| detects the record inhibit state (OFF). ¥
ME The ME/MP tape detection switch detects
the MP state (OFF).
The Hi-8 MP tape detection switch detects _
the normal MP state (OFF). _
$30
(OFF).
CFG The CAPST. FG pulse is defective.
The cassette holder switch detects the state
where the cassette holder is not lowered
Caution: These switches flash when they are
not pressed.
It is abnormal if they flash when
pressed.
Trouble sensor
ICO0901
(150 pulses or less within two seconds.)
Capstan motor
IC0651
IC0901
DC-DC converter circuit
The SW30/25 (CYL. FG) pulse is defective.
(No pulse is input normally within two
seconds.)
Cylinder
IC0631
IC0901
DC-DC converter circuit
Mechanism
mode
switch
UST The unloading stop position detection signal
| is defective.
REW The rewind position detection signal is
defective.
Caution: The positions shown on the left are
detected in the order described
within 10 seconds.
Mechanism mode switch
E7-5